Fig. 10.2 Global distribution patterns of Clausocalanus species: (a) C. parapergens
and C. furcatus, examples of the circumglobal, all-warm-water pattern with typical
differences between them in the exact northern and southern limits; (b) C. arcuicornis,
another circumglobal, all-warm-water pattern, and C. paululus, a circumglobal, all-
warm-water pattern with tropical Pacific hiatus; (c) circumglobal, all-warm-water
species C. mastigophorus and the circumglobal subantarctic species C. ingens; (d) C.
lividus, a circumglobal temperate (or central gyre) species, and C. laticeps, a
circumglobal Antarctic–subantarctic species; (e) C. farrani and C. minor, two Indo-
Pacific temperate–tropical species, and C. jobei, a species occurring in patches around
the world’s oceans; and (f) C. pergens, a transition-zone and cool–tropical species
(eastern tropical Pacific, north equatorial Atlantic) and C. brevipes, a circumglobal,
subantarctic species.
(^) (All after Frost 1969.)